Compilare: user.cpp: In function ‘int main()’: user.cpp:79:18: warning: unused variable ‘s’ [-Wunused-variable] int x, y, z, s, k, j; ^ user.cpp:80:18: warning: unused variable ‘i’ [-Wunused-variable] unsigned int i; ^ user.cpp: In function ‘std::vector<std::pair<int, int> >* apm(std::vector<std::pair<int, int> >*)’: user.cpp:27:43: warning: ‘n’ is used uninitialized in this function [-Wuninitialized] sol = new vector <pair <int, int> >[n + 1]; ^